Lower the action until the G and D strings start to buzz against the
frets (usually the last fret or frets), then raise the bridge on both sides,
1/4 turn on all 4 adjustment screws at a time until the buzz stops/doesn't
occur with a normal force stroke or lighter stroke but will have some fret
slap if played/hit harder than normal. Before you do what I just said adjust
the neck truss rods with the strings at full pitch so that the neck is close
to dead straight as is reasonable meaning an underbow of maybe a business
card thickness or a little less at the 5th, 6th, 7th fret --when strings
are pressed down/fretted on the first and last fret.
This will give you optimal easy action/playability with a wide range of
sounds possible from clean/clear (normal or lighter force stroke/picking) to
dirty (hard or harder force stroke/picking) and make life playing the 12 as
easy as it can be.
The rest is practice, practice, practice 10 -30 min. a day whether you want
to or not if no pain in hand occurs -- if sore left hand rest it a day or
two until OK again then continue --- If any real pain pain or serious
fatigue occurs stop and consult an MD or chiropractor about same and
determine what is safe for you to do to avoid any damage to hand. If no
problems occur keep up practicing until you have the strength to play the 12
string 1/2 hr. a day easily and comfortably. You will now start to get good
at it and it will become as easy as a 6 to play and good for a lot more
music than you think a 12 would be good for and you will be a lot better and
stronger 6 string player and on heavier gauge better sounding strings as
well---no 6 is a problem if you master the 12!!
Sure beats a grip master!!! lol
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